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I am using google open DNS now.

I want to test it's speed. How can I?

I can ping and see that it gets faster. I need some faster way.

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2 Answers

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You Can use the folllowing command: 

  dig YOURDOMAIN +nssearch
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If you just want to time the lookup of a single record, use time dig a foobar.com @8.8.8.8. This testing method really isn't that good since after the first lookup, you'll be getting cached results and whatever server is closer to you will give you the fastest response.

namebench is probably the tool you're looking. It does lookups based on domains are in your browser cache, random records from a list of popular records, etc. It is highly configureable to test your preferred list of DNS servers, your list of records, etc.

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